The critically acclaimed RocknRoller® Multi-Cart® equipment transporters vastly reduce time and effort moving equipment. The patented design instantly transforms into any of 8 configurations to fit any equipment size or shape replacing the need for 8 different carts. Multi-Carts® quickly and ergonomically move huge amounts of gear yet fold small for storage. So innovative they are even featured in college engineering textbooks for outstanding design. Strong steel tube frame with tough textured finish to resist load slippage.